Silvertone Necklace Extender - Spade Charm (2.5"") Silver Necklace Extender - Spade Charm (2.5") features a tiny charm for a unique touch! 2.5 inch long extender has medium sized oval links and a small clasp. A tiny sterling silver charm is fastened at the end of the extender, so it dangles on the back of your neck. These extenders are the perfect choice when wearing an outfit with a low back, or whenever you hair is worn up. Silver charms make them look stylish - people might not even realize that you're wearing a chain length extender!